Arc-radio-oscillation generator



H. F. E LLIOTT. ARC RADIO OSCILLATION GENERATOR.

APPLICATION FILED MAR. 23. 1920.

1,885,121, Patented July 19, 1921.

WITNES INVENTOR flfifizuorr UNITED STATES PATENT OFFICE.

HAROLD I. ELLIOTT, OF PALO ALTO, CALIFORNIA, ASSIGNOR '10 AUGUSTUS TAYLOR, OF SAN FRANCISCO, CALIFORNIA.

ARC-RADIO-OSCILLATION' GENERATOR.

Specification of Letters Iatent.

Patented July 19, 1921.

To all whom it may cmwern Be it known that I, HAROLD F. ELLIOTT, a citizen of the United States, and a resident of Palo Alto, county of Santa Clara, and State of California, have invented certain new and useful Improvements in Arc-Radio- Oscillation Generators, of which the following is a specification.

The invention relates to are radio oscillation generators and particularly to the construction and arrangement of the electrodes between which the arc is formed.

An object of the invention is to provide means for restricting the arc to a narrow sheet of flame.

Another object of the invention is to provide means for holding the arc steady and prevent it from wabbling and wandering around on the anode.

The invention possesses other advantageous features, some of which, with the foreoing, will be set forth at length in the folowin description where I shall outline in full, t at form of the invention which I have selected for illustration in the drawings accompanying and forming part of the resent s ecification. In said rawings have s own one embodiment of my invention, but it is to be understood that the invention is not limited to such form, since the invention, as set forth in the claims, may be embodied in a lurality of forms.

Re erring to said drawings:

Fi re 1 is a side view of the anode showin ti: relation thereto of the magnetic field p Fig. 2 is a lan view showing the electrodes over a field pole.

Fig. 3 is a horizontal section of the anode in its environment with respect to the cathode.

I have found that there is considerable tendency for the arc to wabble and wander around on the anode with occasional jump ing to the magnetic field pole tips. This tendency of the arc to jump to the pole tips has been overcome by reducing the voltage acrossthe are which consequently reduced the power output of the generator. In aecordance with my invention, the arc flame is guided, which produces steadier operation of the generator and the arc does not wabble or jump to the magnet poles, so that a higher voltage may be impressed on the arc, or for a given voltage the magnet pole tips may be placed closer together, reducing the magnetic air gap and permitting the use of smaller ma net coils.

he are is formed between the anode 2 and cathode 3, which are disposed between the magnet pole tips 4. By making the tip 5 of the anode cyllndroconoidal in form or in other words, in the shape of the nose of a bullet or projectile, the arc is restricted to a narrow sheet of flame and does not wander over the surface of the anode. The tip 5 is preferably formed of copper and may be brazed to or formed integral with the hollow anode 2, which is also preferably formed of copper. The anode is cooled by a jet of cooling liquid discharging from the tu e 6 arranged within the anode.

The cathode 3, which is usually formed of carbon, 'is preferably arranged at a right angle to the anode, with the ti of the cathode spaced back slightly from t e end of.

the anode tip so that the arc is formed substantially as shown in Fig. 3. The are thus formed remains steady and results in a more uniform output of the generator.

I claim:

1. In an arc radio generator, a metallic anode having a cylindroconoidal tip and a carbon cathode arranged at an angle to said anode and adjacent said tip. I 2. In an arc radio generator, a hollow metallic anode, a cylindroconoidal tip on said anode and a cathode disposed at a right angle to the anode with the cathode tip spaced backward from the end of the anode tlp.

3. In an arc radio generator, a metallic anode having a cylindroconoidal tip and a cathode arranged at right angles to the anode, with the end of the cathode adjacent the tip.

In testimony whereof. I have hereunto set my hand at Palo Alto, California, this 12th day of March. 1920.

HAROLD F. ELLIOTT.

In presence of- CARL E. SoHoLz, Rear SHEPARD. 

